package com.project.utils;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.URL;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.alibaba.fastjson.JSONObject;
import com.project.model.WxUserInfoModel;

/**
 * 公众平台通用接口工具类
 * 
 * @author liuyq
 * @date 2013-08-09
 */
public class WeixinUtil {
	private static Logger log = LoggerFactory.getLogger(WeixinUtil.class);

	// 菜单创建（POST） 限100（次/天）
	// private static String menu_create_url = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=ACCESS_TOKEN";

	// 获取access_token的接口地址（GET） 限200（次/天）
	private final static String access_token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";

	// 获取openid的接口地址
	private final static String o_auth_openid_url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";
	
	// 获取用户信息的接口地址
	private final static String get_userinfo_url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=ACCESSTOKEN&openid=OPENID";
	
	private final static String get_jsapi_url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=ACCESSTOKEN&type=jsapi";
	
	public static OAuthInfo getOAuthOpenId(String appid, String secret, String code) {
		OAuthInfo oAuthInfo = null;
		String requestUrl = o_auth_openid_url.replace("APPID", appid).replace("SECRET", secret).replace("CODE", code);
		JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
		// oAuthInfo是作者自己把那几个属性参数写在一个类里面了。
		// 如果请求成功
		if (null != jsonObject) {
			try {
				oAuthInfo = new OAuthInfo();
				oAuthInfo.setAccessToken(jsonObject.getString("access_token"));
				oAuthInfo.setExpiresIn(jsonObject.getInteger("expires_in"));
				oAuthInfo.setRefreshToken(jsonObject.getString("refresh_token"));
				oAuthInfo.setOpenId(jsonObject.getString("openid"));
				oAuthInfo.setScope(jsonObject.getString("scope"));
			} catch (Exception e) {
				oAuthInfo = null;
				// 获取token失败
				log.error("网页授权获取openId失败 errcode:{} errmsg:{}",
						jsonObject.getInteger("errcode"),
						jsonObject.getString("errmsg"));
			}
		}
		return oAuthInfo;
	}
	
	public static WxUserInfoModel getUserInfo(String access_token, String openid) {
		WxUserInfoModel wxUserInfo = null;
		String requestUrl = get_userinfo_url.replace("ACCESSTOKEN", access_token).replace("OPENID", openid);
		JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
		// oAuthInfo是作者自己把那几个属性参数写在一个类里面了。
		// 如果请求成功
		if (null != jsonObject) {
			try {
				wxUserInfo = new WxUserInfoModel();
				if (null != jsonObject.getString("errcode")) {
					String errcode = jsonObject.getString("errcode");
					wxUserInfo.setErrcode(errcode);
				} else {
					wxUserInfo.setSubscribe(jsonObject.getInteger("subscribe"));
					wxUserInfo.setOpenid(jsonObject.getString("openid"));
					wxUserInfo.setNickname(jsonObject.getString("nickname"));
					wxUserInfo.setSex(jsonObject.getInteger("sex"));
					wxUserInfo.setLanguage(jsonObject.getString("language"));
					wxUserInfo.setCity(jsonObject.getString("city"));
					wxUserInfo.setProvince(jsonObject.getString("province"));
					wxUserInfo.setCountry(jsonObject.getString("country"));
					wxUserInfo.setHeadimgurl(jsonObject.getString("headimgurl"));
					wxUserInfo.setSubscribe_time(jsonObject.getString("subscribe_time"));
					wxUserInfo.setUnionid(jsonObject.getString("unionid"));
					wxUserInfo.setRemark(jsonObject.getString("remark"));
					wxUserInfo.setGroupid(jsonObject.getInteger("groupid"));
				}
			} catch (Exception e) {
				wxUserInfo = null;
				// 获取token失败
				log.error("网页授权获取openId失败 errcode:{} errmsg:{}",
						jsonObject.getInteger("errcode"),
						jsonObject.getString("errmsg"));
			}
		}
		return wxUserInfo;
	}

	/**
	 * 获取access_token
	 * 
	 * @param appid 凭证
	 * @param appsecret 密钥
	 * @return
	 */
	public static AccessToken getAccessToken(String appid, String appsecret) {
		AccessToken accessToken = null;
		String requestUrl = access_token_url.replace("APPID", appid).replace("APPSECRET", appsecret);
		JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
		// 如果请求成功
		if (null != jsonObject) {
			try {
				accessToken = new AccessToken();
				accessToken.setToken(jsonObject.getString("access_token"));
				accessToken.setExpiresIn(jsonObject.getInteger("expires_in"));
			} catch (Exception e) {
				accessToken = null;
				// 获取token失败
				log.error("获取token失败 errcode:{} errmsg:{}",
						jsonObject.getInteger("errcode"),
						jsonObject.getString("errmsg"));
			}
		}
		return accessToken;
	}
	
	public static JsApiTicket getJsApiTicket(String accessToken) {
        JsApiTicket jsApiTicket = null;
        String requestUrl = get_jsapi_url.replace("ACCESSTOKEN", accessToken);
        JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
        // 如果请求成功
        if (null != jsonObject) {
            try {
                jsApiTicket = new JsApiTicket();
                jsApiTicket.setTicket(jsonObject.getString("ticket"));
                jsApiTicket.setExpiresIn(jsonObject.getInteger("expires_in"));
            } catch (Exception e) {
                accessToken = null;
                // 获取jsApiTicket失败  
                log.error("获取jsApiTicket失败 errcode:{} errmsg:{}", jsonObject.getInteger("errcode"), jsonObject.getString("errmsg"));
            }
        }
        return jsApiTicket;
    }

	/**
	 * 发起https请求并获取结果
	 * 
	 * @param requestUrl 请求地址
	 * @param requestMethod	请求方式（GET、POST）
	 * @param outputStr	提交的数据
	 * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
	 */
	public static JSONObject httpRequest(String requestUrl,
			String requestMethod, String outputStr) {
		JSONObject jsonObject = null;
		StringBuffer buffer = new StringBuffer();
		try {
			// 创建SSLContext对象，并使用我们指定的信任管理器初始化
			TrustManager[] tm = { new MyX509TrustManager() };
			SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
			sslContext.init(null, tm, new java.security.SecureRandom());
			// 从上述SSLContext对象中得到SSLSocketFactory对象
			SSLSocketFactory ssf = sslContext.getSocketFactory();

			URL url = new URL(requestUrl);
			HttpsURLConnection httpUrlConn = (HttpsURLConnection) url
					.openConnection();
			httpUrlConn.setSSLSocketFactory(ssf);

			httpUrlConn.setDoOutput(true);
			httpUrlConn.setDoInput(true);
			httpUrlConn.setUseCaches(false);
			// 设置请求方式（GET/POST）
			httpUrlConn.setRequestMethod(requestMethod);

			if ("GET".equalsIgnoreCase(requestMethod))
				httpUrlConn.connect();

			// 当有数据需要提交时
			if (null != outputStr) {
				OutputStream outputStream = httpUrlConn.getOutputStream();
				// 注意编码格式，防止中文乱码
				outputStream.write(outputStr.getBytes("UTF-8"));
				outputStream.close();
			}

			// 将返回的输入流转换成字符串
			InputStream inputStream = httpUrlConn.getInputStream();
			InputStreamReader inputStreamReader = new InputStreamReader(
					inputStream, "utf-8");
			BufferedReader bufferedReader = new BufferedReader(
					inputStreamReader);

			String str = null;
			while ((str = bufferedReader.readLine()) != null) {
				buffer.append(str);
			}
			bufferedReader.close();
			inputStreamReader.close();
			// 释放资源
			inputStream.close();
			inputStream = null;
			httpUrlConn.disconnect();
			jsonObject = JSONObject.parseObject(buffer.toString());
		} catch (ConnectException ce) {
			log.error("Weixin server connection timed out.");
		} catch (Exception e) {
			log.error("https request error:{}", e);
		}
		return jsonObject;
	}
}
